Lpc2000

Hi Chris,
I'm writing an IAP bootloader for the LPC2114 and test it also on an 
LPC2106 and I saw, that the flash erase takes about 100ms. I think this 
depends on the charge pumps to get the internal stable programming 
voltage for the flash. I tested erasing one or all sectors and the time 
is nearly constant.
If you use the keil IAP example there is also a for loop which takes 
about 300ms. This would explain your 400ms.
Regards, Ralf